/Engine/Source/Runtime/Engine/Public/Animation/AttributesRuntime.h
Blend custom attribute values from N set of inputs
static void BlendAttributes ( const [TArrayView](API\Runtime\Core\Containers\TArrayView)< const [FStackAttributeContainer](API\Runtime\Engine\Animation\FStackAttributeContainer) > SourceAttributes, const [TArrayView](API\Runtime\Core\Containers\TArrayView)< const float > SourceWeights, [FStackAttributeContainer](API\Runtime\Engine\Animation\FStackAttributeContainer) & OutAttributes )